Question

我有一个项目，要求我拍照并将其发送到提供的API。我不想将其保存在本地，一旦捕获到图片，就应立即将其发送到API。

我已经检查了堆栈溢出问题swift Take a photo and save to photo library，但似乎图像存储在本地。

这是我的代码：

func cameraSetup(){

    let captureDevice = AVCaptureDevice.default(for: AVMediaType.video)

    do {
        let input = try AVCaptureDeviceInput(device: captureDevice!)

        captureSession = AVCaptureSession()
        captureSession?.addInput(input)

        videoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession!)
        videoPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
        videoPreviewLayer?.frame = CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.height - 150)
        self.cameraView.layer.addSublayer(videoPreviewLayer!)

        captureSession?.startRunning()
    } catch {
        print(error)
    }
  }
}

我如何立即发送它，而不必先将其保存在本地？

Answer 1

对于这样的任务，您应该考虑使用UIImagePickerController及其Delegate方法。最佳做法是显示用户选项，以在相机和图库（照片库）之间进行选择。

class MyViewController: UIViewController {
    func presentImagePickerActionSheet() {
        let actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)

        func addCameraAction() {
            guard UIImagePickerController.isSourceTypeAvailable(.camera) else { return assertionFailure("No camera") }
            let pickerAction = UIAlertAction(title: "Camera", style: .default) { _ in
                self.pickImage(source: .camera)
            }
            actionSheet.addAction(pickerAction)
        }

        func addGalleryPickerAction() {
            guard UIImagePickerController.isSourceTypeAvailable(.photoLibrary) else { return assertionFailure("No gallery") }
            let pickerAction = UIAlertAction(title: "Gallery", style: .default) { _ in
                self.pickImage(source: .photoLibrary)
            }
            actionSheet.addAction(pickerAction)
        }

        func addRemoveActionIfNeeded() {
            return() // Do your logic if needed
            let pickerAction = UIAlertAction(title: "Delete", style: .destructive) { _ in

            }
            actionSheet.addAction(pickerAction)
        }

        func addCancelAction() {
            let cancelAction = UIAlertAction(title: "cancel", style: .cancel, handler: nil)
            actionSheet.addAction(cancelAction)
        }

        addCameraAction()
        addGalleryPickerAction()
        addRemoveActionIfNeeded()
        addCancelAction()
        present(actionSheet, animated: true)
    }

    private func pickImage(source: UIImagePickerControllerSourceType) {
        guard UIImagePickerController.isSourceTypeAvailable(source) else { return assertionFailure("Source not found") }
        let imagePickerController = UIImagePickerController()
        imagePickerController.sourceType = source
        imagePickerController.delegate = self
        imagePickerController.allowsEditing = true
        present(imagePickerController, animated: true)
    }
}

extension MyViewController: UIImagePickerControllerDelegate {
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        picker.dismiss(animated: true)
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        defer { picker.dismiss(animated: true) }
        let editedImage = info[UIImagePickerControllerEditedImage]
        let originalImage = info[UIImagePickerControllerOriginalImage]
        guard let image = (editedImage ?? originalImage) as? UIImage else { return assertionFailure("Image not found")}

        // Do anything you want with image here




        // In case of need to convert it to data:
        let quality = 1.0
        guard let imageData = UIImageJPEGRepresentation(image, quality) else { return assertionFailure("No image data") }

        // Do anything you want with image data here

    }
}

如何在Swift中使用Alamofire拍摄照片并将其通过网络发送？

1 个答案: